His primary strikeout pitch, Heller’s slider averaged 83.2 mph and 2393 RPM in 2019, en route to a 25.0% SwStr% and six strikeouts on the 11 plate appearances it ended. This was bouyed by the 10% O-Contact on its 35.7% O-Swing rate, but one home run in the small sample pushed the pVAL to -0.5.
GIF made by Myles Nelson.
Blurb written by Alexander Chase